2 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
5 /* ====================================================================
6 * Copyright (c) 2006 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
60 #include "internal/cryptlib.h"
61 #include <openssl/asn1t.h>
62 #include <openssl/x509.h>
63 #include <openssl/rsa.h>
64 #include <openssl/bn.h>
65 #include <openssl/evp.h>
66 #include <openssl/x509v3.h>
67 #ifndef OPENSSL_NO_CMS
68 # include <openssl/cms.h>
70 #include "internal/evp_int.h"
73 /* RSA pkey context structure */
76 /* Key gen parameters */
79 /* Keygen callback info */
81 /* RSA padding mode */
85 /* message digest for MGF1 */
92 unsigned char *oaep_label
;
96 static int pkey_rsa_init(EVP_PKEY_CTX
*ctx
)
99 rctx
= OPENSSL_zalloc(sizeof(*rctx
));
103 rctx
->pad_mode
= RSA_PKCS1_PADDING
;
106 ctx
->keygen_info
= rctx
->gentmp
;
107 ctx
->keygen_info_count
= 2;
112 static int pkey_rsa_copy(EVP_PKEY_CTX
*dst
, EVP_PKEY_CTX
*src
)
114 RSA_PKEY_CTX
*dctx
, *sctx
;
115 if (!pkey_rsa_init(dst
))
119 dctx
->nbits
= sctx
->nbits
;
121 dctx
->pub_exp
= BN_dup(sctx
->pub_exp
);
125 dctx
->pad_mode
= sctx
->pad_mode
;
127 dctx
->mgf1md
= sctx
->mgf1md
;
128 if (sctx
->oaep_label
) {
129 OPENSSL_free(dctx
->oaep_label
);
130 dctx
->oaep_label
= OPENSSL_memdup(sctx
->oaep_label
, sctx
->oaep_labellen
);
131 if (!dctx
->oaep_label
)
133 dctx
->oaep_labellen
= sctx
->oaep_labellen
;
138 static int setup_tbuf(RSA_PKEY_CTX
*ctx
, EVP_PKEY_CTX
*pk
)
142 ctx
->tbuf
= OPENSSL_malloc(EVP_PKEY_size(pk
->pkey
));
143 if (ctx
->tbuf
== NULL
)
148 static void pkey_rsa_cleanup(EVP_PKEY_CTX
*ctx
)
150 RSA_PKEY_CTX
*rctx
= ctx
->data
;
152 BN_free(rctx
->pub_exp
);
153 OPENSSL_free(rctx
->tbuf
);
154 OPENSSL_free(rctx
->oaep_label
);
159 static int pkey_rsa_sign(EVP_PKEY_CTX
*ctx
, unsigned char *sig
,
160 size_t *siglen
, const unsigned char *tbs
,
164 RSA_PKEY_CTX
*rctx
= ctx
->data
;
165 RSA
*rsa
= ctx
->pkey
->pkey
.rsa
;
168 if (tbslen
!= (size_t)EVP_MD_size(rctx
->md
)) {
169 RSAerr(RSA_F_PKEY_RSA_SIGN
, RSA_R_INVALID_DIGEST_LENGTH
);
173 if (EVP_MD_type(rctx
->md
) == NID_mdc2
) {
175 if (rctx
->pad_mode
!= RSA_PKCS1_PADDING
)
177 ret
= RSA_sign_ASN1_OCTET_STRING(0,
178 tbs
, tbslen
, sig
, &sltmp
, rsa
);
183 } else if (rctx
->pad_mode
== RSA_X931_PADDING
) {
184 if ((size_t)EVP_PKEY_size(ctx
->pkey
) < tbslen
+ 1) {
185 RSAerr(RSA_F_PKEY_RSA_SIGN
, RSA_R_KEY_SIZE_TOO_SMALL
);
188 if (!setup_tbuf(rctx
, ctx
)) {
189 RSAerr(RSA_F_PKEY_RSA_SIGN
, ERR_R_MALLOC_FAILURE
);
192 memcpy(rctx
->tbuf
, tbs
, tbslen
);
193 rctx
->tbuf
[tbslen
] = RSA_X931_hash_id(EVP_MD_type(rctx
->md
));
194 ret
= RSA_private_encrypt(tbslen
+ 1, rctx
->tbuf
,
195 sig
, rsa
, RSA_X931_PADDING
);
196 } else if (rctx
->pad_mode
== RSA_PKCS1_PADDING
) {
198 ret
= RSA_sign(EVP_MD_type(rctx
->md
),
199 tbs
, tbslen
, sig
, &sltmp
, rsa
);
203 } else if (rctx
->pad_mode
== RSA_PKCS1_PSS_PADDING
) {
204 if (!setup_tbuf(rctx
, ctx
))
206 if (!RSA_padding_add_PKCS1_PSS_mgf1(rsa
,
208 rctx
->md
, rctx
->mgf1md
,
211 ret
= RSA_private_encrypt(RSA_size(rsa
), rctx
->tbuf
,
212 sig
, rsa
, RSA_NO_PADDING
);
216 ret
= RSA_private_encrypt(tbslen
, tbs
, sig
, ctx
->pkey
->pkey
.rsa
,
224 static int pkey_rsa_verifyrecover(EVP_PKEY_CTX
*ctx
,
225 unsigned char *rout
, size_t *routlen
,
226 const unsigned char *sig
, size_t siglen
)
229 RSA_PKEY_CTX
*rctx
= ctx
->data
;
232 if (rctx
->pad_mode
== RSA_X931_PADDING
) {
233 if (!setup_tbuf(rctx
, ctx
))
235 ret
= RSA_public_decrypt(siglen
, sig
,
236 rctx
->tbuf
, ctx
->pkey
->pkey
.rsa
,
241 if (rctx
->tbuf
[ret
] != RSA_X931_hash_id(EVP_MD_type(rctx
->md
))) {
242 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER
,
243 RSA_R_ALGORITHM_MISMATCH
);
246 if (ret
!= EVP_MD_size(rctx
->md
)) {
247 RSAerr(RSA_F_PKEY_RSA_VERIFYRECOVER
,
248 RSA_R_INVALID_DIGEST_LENGTH
);
252 memcpy(rout
, rctx
->tbuf
, ret
);
253 } else if (rctx
->pad_mode
== RSA_PKCS1_PADDING
) {
255 ret
= int_rsa_verify(EVP_MD_type(rctx
->md
),
256 NULL
, 0, rout
, &sltmp
,
257 sig
, siglen
, ctx
->pkey
->pkey
.rsa
);
264 ret
= RSA_public_decrypt(siglen
, sig
, rout
, ctx
->pkey
->pkey
.rsa
,
272 static int pkey_rsa_verify(EVP_PKEY_CTX
*ctx
,
273 const unsigned char *sig
, size_t siglen
,
274 const unsigned char *tbs
, size_t tbslen
)
276 RSA_PKEY_CTX
*rctx
= ctx
->data
;
277 RSA
*rsa
= ctx
->pkey
->pkey
.rsa
;
280 if (rctx
->pad_mode
== RSA_PKCS1_PADDING
)
281 return RSA_verify(EVP_MD_type(rctx
->md
), tbs
, tbslen
,
283 if (rctx
->pad_mode
== RSA_X931_PADDING
) {
284 if (pkey_rsa_verifyrecover(ctx
, NULL
, &rslen
, sig
, siglen
) <= 0)
286 } else if (rctx
->pad_mode
== RSA_PKCS1_PSS_PADDING
) {
288 if (!setup_tbuf(rctx
, ctx
))
290 ret
= RSA_public_decrypt(siglen
, sig
, rctx
->tbuf
,
291 rsa
, RSA_NO_PADDING
);
294 ret
= RSA_verify_PKCS1_PSS_mgf1(rsa
, tbs
,
295 rctx
->md
, rctx
->mgf1md
,
296 rctx
->tbuf
, rctx
->saltlen
);
303 if (!setup_tbuf(rctx
, ctx
))
305 rslen
= RSA_public_decrypt(siglen
, sig
, rctx
->tbuf
,
306 rsa
, rctx
->pad_mode
);
311 if ((rslen
!= tbslen
) || memcmp(tbs
, rctx
->tbuf
, rslen
))
318 static int pkey_rsa_encrypt(EVP_PKEY_CTX
*ctx
,
319 unsigned char *out
, size_t *outlen
,
320 const unsigned char *in
, size_t inlen
)
323 RSA_PKEY_CTX
*rctx
= ctx
->data
;
324 if (rctx
->pad_mode
== RSA_PKCS1_OAEP_PADDING
) {
325 int klen
= RSA_size(ctx
->pkey
->pkey
.rsa
);
326 if (!setup_tbuf(rctx
, ctx
))
328 if (!RSA_padding_add_PKCS1_OAEP_mgf1(rctx
->tbuf
, klen
,
332 rctx
->md
, rctx
->mgf1md
))
334 ret
= RSA_public_encrypt(klen
, rctx
->tbuf
, out
,
335 ctx
->pkey
->pkey
.rsa
, RSA_NO_PADDING
);
337 ret
= RSA_public_encrypt(inlen
, in
, out
, ctx
->pkey
->pkey
.rsa
,
345 static int pkey_rsa_decrypt(EVP_PKEY_CTX
*ctx
,
346 unsigned char *out
, size_t *outlen
,
347 const unsigned char *in
, size_t inlen
)
350 RSA_PKEY_CTX
*rctx
= ctx
->data
;
351 if (rctx
->pad_mode
== RSA_PKCS1_OAEP_PADDING
) {
353 if (!setup_tbuf(rctx
, ctx
))
355 ret
= RSA_private_decrypt(inlen
, in
, rctx
->tbuf
,
356 ctx
->pkey
->pkey
.rsa
, RSA_NO_PADDING
);
359 for (i
= 0; i
< ret
; i
++) {
363 ret
= RSA_padding_check_PKCS1_OAEP_mgf1(out
, ret
, rctx
->tbuf
+ i
,
367 rctx
->md
, rctx
->mgf1md
);
369 ret
= RSA_private_decrypt(inlen
, in
, out
, ctx
->pkey
->pkey
.rsa
,
377 static int check_padding_md(const EVP_MD
*md
, int padding
)
383 mdnid
= EVP_MD_type(md
);
385 if (padding
== RSA_NO_PADDING
) {
386 RSAerr(RSA_F_CHECK_PADDING_MD
, RSA_R_INVALID_PADDING_MODE
);
390 if (padding
== RSA_X931_PADDING
) {
391 if (RSA_X931_hash_id(mdnid
) == -1) {
392 RSAerr(RSA_F_CHECK_PADDING_MD
, RSA_R_INVALID_X931_DIGEST
);
397 /* List of all supported RSA digests */
412 RSAerr(RSA_F_CHECK_PADDING_MD
, RSA_R_INVALID_DIGEST
);
421 static int pkey_rsa_ctrl(EVP_PKEY_CTX
*ctx
, int type
, int p1
, void *p2
)
423 RSA_PKEY_CTX
*rctx
= ctx
->data
;
425 case EVP_PKEY_CTRL_RSA_PADDING
:
426 if ((p1
>= RSA_PKCS1_PADDING
) && (p1
<= RSA_PKCS1_PSS_PADDING
)) {
427 if (!check_padding_md(rctx
->md
, p1
))
429 if (p1
== RSA_PKCS1_PSS_PADDING
) {
430 if (!(ctx
->operation
&
431 (EVP_PKEY_OP_SIGN
| EVP_PKEY_OP_VERIFY
)))
434 rctx
->md
= EVP_sha1();
436 if (p1
== RSA_PKCS1_OAEP_PADDING
) {
437 if (!(ctx
->operation
& EVP_PKEY_OP_TYPE_CRYPT
))
440 rctx
->md
= EVP_sha1();
446 RSAerr(RSA_F_PKEY_RSA_CTRL
,
447 RSA_R_ILLEGAL_OR_UNSUPPORTED_PADDING_MODE
);
450 case EVP_PKEY_CTRL_GET_RSA_PADDING
:
451 *(int *)p2
= rctx
->pad_mode
;
454 case EVP_PKEY_CTRL_RSA_PSS_SALTLEN
:
455 case EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN
:
456 if (rctx
->pad_mode
!= RSA_PKCS1_PSS_PADDING
) {
457 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PSS_SALTLEN
);
460 if (type
== EVP_PKEY_CTRL_GET_RSA_PSS_SALTLEN
)
461 *(int *)p2
= rctx
->saltlen
;
469 case EVP_PKEY_CTRL_RSA_KEYGEN_BITS
:
471 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_KEY_SIZE_TOO_SMALL
);
477 case EVP_PKEY_CTRL_RSA_KEYGEN_PUBEXP
:
480 BN_free(rctx
->pub_exp
);
484 case EVP_PKEY_CTRL_RSA_OAEP_MD
:
485 case EVP_PKEY_CTRL_GET_RSA_OAEP_MD
:
486 if (rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
487 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PADDING_MODE
);
490 if (type
== EVP_PKEY_CTRL_GET_RSA_OAEP_MD
)
491 *(const EVP_MD
**)p2
= rctx
->md
;
496 case EVP_PKEY_CTRL_MD
:
497 if (!check_padding_md(p2
, rctx
->pad_mode
))
502 case EVP_PKEY_CTRL_GET_MD
:
503 *(const EVP_MD
**)p2
= rctx
->md
;
506 case EVP_PKEY_CTRL_RSA_MGF1_MD
:
507 case EVP_PKEY_CTRL_GET_RSA_MGF1_MD
:
508 if (rctx
->pad_mode
!= RSA_PKCS1_PSS_PADDING
509 && rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
510 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_MGF1_MD
);
513 if (type
== EVP_PKEY_CTRL_GET_RSA_MGF1_MD
) {
515 *(const EVP_MD
**)p2
= rctx
->mgf1md
;
517 *(const EVP_MD
**)p2
= rctx
->md
;
522 case EVP_PKEY_CTRL_RSA_OAEP_LABEL
:
523 if (rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
524 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PADDING_MODE
);
527 OPENSSL_free(rctx
->oaep_label
);
529 rctx
->oaep_label
= p2
;
530 rctx
->oaep_labellen
= p1
;
532 rctx
->oaep_label
= NULL
;
533 rctx
->oaep_labellen
= 0;
537 case EVP_PKEY_CTRL_GET_RSA_OAEP_LABEL
:
538 if (rctx
->pad_mode
!= RSA_PKCS1_OAEP_PADDING
) {
539 RSAerr(RSA_F_PKEY_RSA_CTRL
, RSA_R_INVALID_PADDING_MODE
);
542 *(unsigned char **)p2
= rctx
->oaep_label
;
543 return rctx
->oaep_labellen
;
545 case EVP_PKEY_CTRL_DIGESTINIT
:
546 case EVP_PKEY_CTRL_PKCS7_ENCRYPT
:
547 case EVP_PKEY_CTRL_PKCS7_DECRYPT
:
548 case EVP_PKEY_CTRL_PKCS7_SIGN
:
550 #ifndef OPENSSL_NO_CMS
551 case EVP_PKEY_CTRL_CMS_DECRYPT
:
552 case EVP_PKEY_CTRL_CMS_ENCRYPT
:
553 case EVP_PKEY_CTRL_CMS_SIGN
:
556 case EVP_PKEY_CTRL_PEER_KEY
:
557 RSAerr(RSA_F_PKEY_RSA_CTRL
,
558 RSA_R_OPERATION_NOT_SUPPORTED_FOR_THIS_KEYTYPE
);
567 static int pkey_rsa_ctrl_str(EVP_PKEY_CTX
*ctx
,
568 const char *type
, const char *value
)
571 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_VALUE_MISSING
);
574 if (strcmp(type
, "rsa_padding_mode") == 0) {
576 if (strcmp(value
, "pkcs1") == 0)
577 pm
= RSA_PKCS1_PADDING
;
578 else if (strcmp(value
, "sslv23") == 0)
579 pm
= RSA_SSLV23_PADDING
;
580 else if (strcmp(value
, "none") == 0)
582 else if (strcmp(value
, "oeap") == 0)
583 pm
= RSA_PKCS1_OAEP_PADDING
;
584 else if (strcmp(value
, "oaep") == 0)
585 pm
= RSA_PKCS1_OAEP_PADDING
;
586 else if (strcmp(value
, "x931") == 0)
587 pm
= RSA_X931_PADDING
;
588 else if (strcmp(value
, "pss") == 0)
589 pm
= RSA_PKCS1_PSS_PADDING
;
591 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_UNKNOWN_PADDING_TYPE
);
594 return EVP_PKEY_CTX_set_rsa_padding(ctx
, pm
);
597 if (strcmp(type
, "rsa_pss_saltlen") == 0) {
599 saltlen
= atoi(value
);
600 return EVP_PKEY_CTX_set_rsa_pss_saltlen(ctx
, saltlen
);
603 if (strcmp(type
, "rsa_keygen_bits") == 0) {
606 return EVP_PKEY_CTX_set_rsa_keygen_bits(ctx
, nbits
);
609 if (strcmp(type
, "rsa_keygen_pubexp") == 0) {
611 BIGNUM
*pubexp
= NULL
;
612 if (!BN_asc2bn(&pubexp
, value
))
614 ret
= EVP_PKEY_CTX_set_rsa_keygen_pubexp(ctx
, pubexp
);
620 if (strcmp(type
, "rsa_mgf1_md") == 0) {
622 if ((md
= EVP_get_digestbyname(value
)) == NULL
) {
623 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_INVALID_DIGEST
);
626 return EVP_PKEY_CTX_set_rsa_mgf1_md(ctx
, md
);
629 if (strcmp(type
, "rsa_oaep_md") == 0) {
631 if ((md
= EVP_get_digestbyname(value
)) == NULL
) {
632 RSAerr(RSA_F_PKEY_RSA_CTRL_STR
, RSA_R_INVALID_DIGEST
);
635 return EVP_PKEY_CTX_set_rsa_oaep_md(ctx
, md
);
637 if (strcmp(type
, "rsa_oaep_label") == 0) {
641 lab
= string_to_hex(value
, &lablen
);
644 ret
= EVP_PKEY_CTX_set0_rsa_oaep_label(ctx
, lab
, lablen
);
653 static int pkey_rsa_keygen(EVP_PKEY_CTX
*ctx
, EVP_PKEY
*pkey
)
656 RSA_PKEY_CTX
*rctx
= ctx
->data
;
659 if (rctx
->pub_exp
== NULL
) {
660 rctx
->pub_exp
= BN_new();
661 if (rctx
->pub_exp
== NULL
|| !BN_set_word(rctx
->pub_exp
, RSA_F4
))
667 if (ctx
->pkey_gencb
) {
668 pcb
= BN_GENCB_new();
673 evp_pkey_set_cb_translate(pcb
, ctx
);
676 ret
= RSA_generate_key_ex(rsa
, rctx
->nbits
, rctx
->pub_exp
, pcb
);
679 EVP_PKEY_assign_RSA(pkey
, rsa
);
685 const EVP_PKEY_METHOD rsa_pkey_meth
= {
687 EVP_PKEY_FLAG_AUTOARGLEN
,
704 pkey_rsa_verifyrecover
,